Brother HL-L5000D Service Manual page 95

 Error code 7B04
The MX 3bin stack sensor does not detect paper pass within the specified time after the MX
jam upper sensor detected paper pass.
<User Check>
• Remove the jammed paper.
• Close the MX back cover correctly.
Step
Foreign object in the rear of the
1
machine
2 MX flapper 3 attachment failure Reattach the MX flapper 3.
MX 3bin stack actuator
3
attachment failure
Connection failure of the MX
4
flapper 3 solenoid harness
Connection failure of the MX
5
3bin stack sensor harness
Connection failure of the MX
6
relay PCB harness
7 MX 3bin stack sensor failure
8 MX flapper 3 solenoid failure
9 MX relay PCB failure
10 MX control PCB failure
11 Main PCB failure
Cause
Remove the foreign object.
Reattach the MX 3bin stack actuator.
Reconnect the MX flapper 3 solenoid harness.
Reconnect the MX 3bin stack sensor harness.
Reconnect the MX relay PCB harness.
Replace the MX 3bin stack sensor.
Replace the MX flapper 3 solenoid.
Replace the MX relay PCB ASSY.
Replace the MX control PCB ASSY.
Replace the main PCB ASSY.
2-69
Remedy
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